Large power ultra short wave generator



July 14, 1936. H. E. HOLLMANN 2,047,204

LARGE POWER ULTRA SHORT WAVE GENERATOR Filed June 50, 1955 INVENTOR HANS ERICH HOLLMANN ATTORNEY Patented July 14, 1936 UNITED STATES PATENT OFFICE LARGE POWER ULTRA SHORT WAVE GENERATOR Hans Erich Hollmann, Berlin, Germany, assignor' to Telel'unken Gesellsch'att tiir Drahtlose Telegraphic in. b. 11., Berlin, Germany, a corporation of Germany Application June 30, 1933, Serial No. 678,486

Germany June 30, 1932 3 Claims. (01. 250-215) 5 ment by having the electrodes of the device provided at bothends with energy supply leads, and the device itseli at both or its ends with a tunable parallel wire (Lecher) system. The assemblage then acts as a single energy line which oscillates with one or more half waves, with the oscillator being disposed in the potential loop or anti-node.

In order that very large powers may be obtained, the customary method, i. e. to enlarge the oscillator valve, is impracticable, whenever ultra lli short waves are dealt with, because the wave length is directly related with the valve dimen-' sions. For this reason, the only solution for theproblem of obtaining a large power output has been to parallel a plurality of individual generators or oscillators, or else to raise the load per unit of the electron discharge device, and this has been made possible by cooling the electrodes by a fluid or a gas.

Now, according to the present invention, when using a scheme of this kind, special advantages are obtainable by using the tuning systems connected at both ends of the device for the purpose of supplying and draining (inlet and outlet) of the chilling liquid. For this purpose, the parallel leads should consist of tubes, and the same should be so connected with the electrodes which are also designed to be provided with cooling tubes, that the chilling liquid may flow therethrough unobstructed.

One embodiment of the invention is illustrated in the attached drawing. Referring to the latter, R designates the oscillator electron discharge device which has a filament K, a grid G and a plate A. In order to absorb the thermal load 40 and to carry the same off by way of a chilling tube, the grid, which in the scheme predicated upon electron reversal principle (retarding scheme) is called upon to absorb the whole loss energy, is made of a special form of construc- 45 tion. It consists of a cooling tube T upon which tube T which is designed to insure adequate abduction of heat.

Now, upon both ends of this oscillator or generator device, there are mounted the two Lecher wire systems D and D which consist of two leads 55 and the tuning bridge pieces C and C, respectively. According to this invention, the said Lecher leads or wires are tubular and these are so united with the cooling tubes T and T of the electrodes that the chilling fluid or liquid can easily flow therethrough. Inasmuch as the said Lecher wires at the same time conduct or carry the electrode potentials, it is preferable to employ-for the cooling an insulating liquid, such as oil, or a gas. In order that cracking or bursting of the glass body of the device R may be precluded as a result of expansion of the chilling tubes T and T, glass springs F are provided at least at one end designed to compensate for such slight changes in length as may happen in the electrodes.

It will be evident that the idea underlying this invention is similarly applicable to types of electron discharge device equipped, for instance, with two or four electrodes. It is likewise applicable and useful in multiple unit types of device schemes in which several devices in sequence or series are aligned on a joint energy line. In such case, all of the devices may be traversed by the chilling fluids sequentially.

I claim:

1. An ultra short wave electron discharge device oscillation generator comprising an envelope having therein grid, anode, and cathode electrodes, and an oscillatory circuit comprising two parallel energy supply leads extending through said envelope and connected to said anode and control electrodes respectively for supplying energy thereto, another oscillatory circuit comprising the extension of said two energy supply leads through said envelope, said leads being in the form of hollow tubes for accommodating coolin fluid for the grid and anode electrodes of said generator.

2. An ultra short wave oscillation generator comprising an electron discharge device having grid, anode and cathode electrodes, a hollow tube extending through both ends of said device and connected to said grid for supplying said grid with potentials and for cooling said grid with a fluid flowing through said tube, another hollow tube parallel to said first tube and also extending through both ends of said device, said last tube being connected to said anode for supplying said anode with potential and for cooling same, and a capacitive bridge connected across said two tubes and forming therewith an oscillatory circuit.

3. An ultra short wave oscillation generator comprising an electron discharge device having grid, anode and cathode electrodes, said grid being in the form or a plurality of metallic rings surrounding said cathode and positioned in parallel planes, a hollow tube extending through said device to supply said grid rings with potential and 5 supporting said grid, another hollow tube parallel to said first tube and supporting said anode and supplying said anode with a. suitable polariifing potential, said tubes being respectively adapted to suppLv cooling fluid to said grid and anode, and a. bridge across said tubes constituting therewith an oscillatory circuit.

HANS ERICH HOLIMANN. 

